Just upgraded the firmware on my S4. All went smoothly after the update kies said i needed to upgrade to version 3. Did the upgrade and not realizing i opened the old version on my desktop. I started to do a backup and it made it 1/2 way though the backup and just stoped (i was backing phone up to computer). I canceled the backup and closed the program. I then realized that i had the wrong version open. Opened 3 and now the phone will not connect. Even when i plug it into the computer it gives me a connectivity error in the printers & devices. I uninstalled all versions and just re installed 3 and still get the same error.